:root {
  font-family: "PingFang SC", "Noto Sans SC", sans-serif;
  color: #0f172a;
  background:
    radial-gradient(circle at top left, rgba(34, 197, 94, 0.18), transparent 25%),
    radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.16), transparent 22%),
    linear-gradient(135deg, #f8fafc 0%, #eefbf3 45%, #f3f7fb 100%);
  line-height: 1.5;
  font-weight: 400;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

button,
textarea {
  font: inherit;
}

.layout-shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 100vh;
}

.side-nav {
  padding: 32px 24px;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.96) 0%, rgba(21, 44, 79, 0.92) 100%);
  color: #e2e8f0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.eyebrow {
  margin: 0 0 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: #38bdf8;
}

.side-copy {
  color: #bfd6ea;
  max-width: 220px;
}

.nav-list {
  display: grid;
  gap: 12px;
}

.nav-link {
  color: #dbeafe;
  text-decoration: none;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  transition: transform 160ms ease, background 160ms ease;
}

.nav-link.active,
.nav-link:hover {
  background: rgba(56, 189, 248, 0.18);
  transform: translateX(3px);
}

.content-area {
  padding: 28px;
}

.page-grid {
  display: grid;
  gap: 20px;
}

.hero-card,
.panel,
.match-card {
  border: 1px solid rgba(148, 163, 184, 0.25);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

.hero-card,
.panel {
  padding: 22px;
}

.panel-head,
.match-topline,
.button-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

textarea {
  width: 100%;
  margin: 12px 0 0;
  border: 1px solid #cbd5e1;
  border-radius: 18px;
  padding: 16px;
  background: #f8fafc;
  resize: vertical;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  background: linear-gradient(135deg, #0f766e 0%, #0284c7 100%);
  color: white;
  cursor: pointer;
}

button.ghost {
  background: #e2e8f0;
  color: #0f172a;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.badge {
  background: #dcfce7;
  color: #166534;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
}

.code-block,
.mini-code {
  margin: 0;
  overflow: auto;
  background: #0f172a;
  color: #dbeafe;
  border-radius: 18px;
  padding: 16px;
}

.match-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.match-card {
  padding: 18px;
}

.reason-list p {
  margin: 10px 0;
}

@media (max-width: 920px) {
  .layout-shell {
    grid-template-columns: 1fr;
  }

  .side-copy {
    max-width: none;
  }
}